Biennale

Biennale is Italian for "every other year" and can be used to describe any event that happens every two years. It is commonly used within the art world to describe an international manifestation of contemporary art (for example, the "Biennale de Paris" which was created in 1959 by André Malraux). The word is spelled identically (biennale) in French. English speakers sometimes use the equivalent English word, biennial (for example, the "Venice Biennial") in speaking or writing of such events.

http://en.wikipedia.org/wiki/Biennale